Just how good does an M &S chocolate eclair have to be to justify the price of £6.50 for two? Last time Matt and I were in M&S food hall I was wondering whether to buy some. I walked away. (Their regular eclairs are £2.40 for 4, so these needed to be almost five times better.) Today this arrived with my morning coffee. Apparently the question had been troubling Matt and he needed to find out!